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Abstract
Chemotherapeutic agents can cause peripheral neuropathy, a deleterious side effect of cancer treatment. Hyperbaric oxygen (HBO2) treatment has shown great potential for decreasing pain in numerous clinical pain conditions and in preclinical studies. This study was designed to test whether HBO2 might also be useful for treating chemotherapy-induced peripheral neuropathy. Male and female Sprague-Dawley rats were injected with 1 mg/kg paclitaxel or vehicle every other day for 7 days to induce allodynia, followed by either one single, or four daily 60-min exposures to HBO2 or room air. Mechanical and cold allodynia as well as locomotor behavior and body weight were assessed intermittently for several weeks. Estrous cycling was also tracked in female rats. Paclitaxel caused pronounced mechanical allodynia in both sexes that was completely reversed by either one or four treatments of HBO2. Females in all treatment groups showed greater cold acetone scores than males, and acetone scores were not reliably reduced by HBO2 treatment. Neither paclitaxel nor HBO2 treatment altered locomotor behavior or estrous cycling. We conclude that HBO2 treatment was highly effective at reducing mechanical allodynia in paclitaxel-treated rats without affecting weight gain, locomotion, or estrous cycling, suggesting that HBO2 may be effective for treating chemotherapy-induced neuropathic pain without producing significant side effects.
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Serin M, Altinel D, Leblebici C, Biltekin B, Huseyinbas O, Kurt Yazar S, Irmak F, Sonmez A, Bayramicli M. Subdermal nitrous oxide delivery increases skin microcirculation and random flap survival in rats. J Plast Surg Hand Surg 2018; 53:37-44. [PMID: 30371138 DOI: 10.1080/2000656x.2018.1531013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Random skin flaps are essential tools in reconstructive surgery. In this study, we investigated the effect of subdermal nitrous oxide (N2O) application on random flap survival. In this experimental study, we used 21 female rats in three groups. In the N2O and air groups, gases were administrated under the proposed dorsal flap areas daily for seven days. Following the treatment period, flaps were raised and inserted back into their place from the dorsal skin. In the control group, the flaps were elevated and inserted back to their place without any pretreatment. Calculation of necrotic flap areas, histological examination and microangiography was performed to evaluate the results 7 days after the flap surgery. The average of necrotic flap area in the N2O, air and control group was 13.45%, 37.67% and 46.43%, respectively. (N2O vs air p = .044; N2O vs control p = .003). The average number of capillary formations identified in the histological analysis was 7.0 ± 1.58, 3.75 ± 2.36 and 4.4 ± 0.54 in the N2O, air and control group, respectively. (N2O vs air p = .017; N2O vs control p = .037). The average number of capillary structures identified in the angiography images were 6.3 ± 1.52, 1.6 ± 1.15 and 1.3 ± 0.57 in the N2O, air and control group, respectively. (N2O vs air p = .04; N2O vs control p = .02). We conclude that subdermal N2O application increases random flap survival through an increase in the skin microcirculation and could be promising for future clinical applications.
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Affiliation(s)
- Merdan Serin
- a Department of Plastic and Reconstructive Surgery , Istanbul Training and Research Hospital, University of Health Sciences , Istanbul , Turkey
| | - Dincer Altinel
- a Department of Plastic and Reconstructive Surgery , Istanbul Training and Research Hospital, University of Health Sciences , Istanbul , Turkey
| | - Cem Leblebici
- b Department of Pathology , Istanbul Training and Research Hospital, University of Health Sciences , Istanbul , Turkey
| | - Burcu Biltekin
- c Department of Histology and Embryology , Cerrahpasa Medical School, Istanbul University , Istanbul , Turkey
| | - Onder Huseyinbas
- d Animal Research Laboratory , Istanbul Bezmialem University Medical School , Istanbul , Turkey
| | - Sevgi Kurt Yazar
- a Department of Plastic and Reconstructive Surgery , Istanbul Training and Research Hospital, University of Health Sciences , Istanbul , Turkey
| | - Fatih Irmak
- e Department of Plastic and Reconstructive Surgery , Istanbul Sisli Etfal Training and Research Hospital, University of Health Sciences , Istanbul , Turkey
| | - Ahmet Sonmez
- f Private practice in Plastic and Reconstructive Surgery , Istanbul , Turkey
| | - Mehmet Bayramicli
- g Department of Plastic and Reconstructive Surgery , Marmara University School of Medicine , Istanbul , Turkey
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Fluegge K. Environmental contributors to modulation of brain estrogen signaling and male gender bias in autism: A reply to the oral contraceptive use hypothesis by Strifert (2015). Med Hypotheses 2017; 104:178-181. [PMID: 28673581 DOI: 10.1016/j.mehy.2017.06.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Revised: 04/29/2017] [Accepted: 06/20/2017] [Indexed: 11/28/2022]
Abstract
Strifert has recently put forward an interesting hypothesis regarding the role of oral contraceptive (OC) use in mothers and risk of offspring autism spectrum disorder (ASD). First, the author reports that combined oral contraceptives (COCs), containing both estrogen and progesterone, were developed in the late 1950s and early 60s, which is a time-frame distinct from Leo Kanner's documentation of infantile ASD in 1943 that Strifert just briefly mentions. While this important temporal inconsistency of ASD origin does not invalidate the potential role of OC use in contributing to the rise of ASD, it does support the likely possibility of other environmental exposures at play. Second, the epigenetic basis of the hypothesis is that the endocrine-disrupting components (i.e., ethinylestradiol) of OC perturb estrogenic signaling in the fetal brain by triggering aberrant DNA methylation of the estrogen receptor β (ERβ) gene, and such methylation patterns may be imprinted to future generations and could theoretically increase subsequent ASD offspring risk. The premise of the hypothesis is challenged, however, with the recognition that MeCP2, a "reader" of DNA methylation sites, is not only associated with age-dependent alteration in ERβ in females but is also significantly reduced in ASD brain. Furthermore, Strifert does not clearly address how the OC hypothesis accounts for the male bias in ASD. Therefore, the purpose of this correspondence is to address these inconsistencies by proposing a hypothesis that challenges these points. That is, gestational exposure to the agricultural and combustion air pollutant, nitrous oxide (N2O), may be a leading contributor to the development of an ASD phenotype. The mechanism undergirding this hypothesis suggests that compensatory estrogenic activity may mitigate the effects of fetal N2O exposure and thereby confer a protective effect against ASD development in a sex-dependent manner (i.e., male bias in ASD).
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Affiliation(s)
- Keith Fluegge
- Institute of Health and Environmental Research, Cleveland, OH 44118, USA.
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Chung E, Ohgami Y, Quock RM. Increasing the availability of l-arginine and nitric oxide increases sensitivity of nitrous oxide (N2O)-insensitive inbred mice to N2O-induced antinociception. Brain Res Bull 2016; 125:218-21. [PMID: 27496065 DOI: 10.1016/j.brainresbull.2016.08.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Revised: 07/20/2016] [Accepted: 08/01/2016] [Indexed: 10/21/2022]
Abstract
Nitrous oxide (N2O)-induced antinociception in mice is dependent on the neuromodulator nitric oxide (NO). In contrast to C57BL/6J (B6) mice, DBA/2J (D2) mice fail to respond to N2O with a robust antinociceptive response or with an increase in brain nitric oxide synthase (NOS) enzyme activity, suggesting that failure of D2 mice to respond to N2O might result from a deficit of NO function. Therefore, it was of interest to determine whether increasing the availability of NO might increase sensitivity of D2 mice to N2O. Male D2 mice were pretreated with sub-antinociceptive intracerebroventricular doses of the NO donor 3-morpholinosydnoimine or the NO precursor l-arginine then assessed for responsiveness to N2O-induced antinociception using the acetic acid abdominal constriction test. Both pretreatments increased the antinociceptive responsiveness of D2 mice to N2O. These results indicate that the NOS enzyme in D2 mice is functional and that the deficit in NO function that obstructs sensitivity to N2O-induced antinociception may lie in availability or utilization of l-arginine.
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Affiliation(s)
- Eunhee Chung
- Department of Pharmaceutical Sciences, College of Pharmacy, Washington State University, Pullman, WA 99164, United States
| | - Yusuke Ohgami
- Department of Pharmaceutical Sciences, College of Pharmacy, Washington State University, Pullman, WA 99164, United States
| | - Raymond M Quock
- Department of Pharmaceutical Sciences, College of Pharmacy, Washington State University, Pullman, WA 99164, United States.
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Regulatory effects of anesthetics on nitric oxide. Life Sci 2016; 151:76-85. [DOI: 10.1016/j.lfs.2016.02.094] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2015] [Revised: 02/20/2016] [Accepted: 02/26/2016] [Indexed: 12/26/2022]
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Turan A, Sarwar S, Atim A, Deogaonkar A, Yousef HF, Katyal S, Liu J, You J, Leizman D, Mekhail N, Sessler DI. Nitrous Oxide for the Treatment of Chronic Low Back Pain. Anesth Analg 2015; 121:1350-9. [DOI: 10.1213/ane.0000000000000951] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Mu XY, Li C, Li YL, Liu Y, Wang XS. A Convenient Synthesis of Pyridophenanthroline Derivatives under Catalyst Free Conditions. J Heterocycl Chem 2015. [DOI: 10.1002/jhet.2050] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Xing-Ye Mu
- School of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials; Jiangsu Normal University; Xuzhou Jiangsu 221116 People's Republic of China
| | - Chao Li
- School of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials; Jiangsu Normal University; Xuzhou Jiangsu 221116 People's Republic of China
| | - Yu-Ling Li
- School of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials; Jiangsu Normal University; Xuzhou Jiangsu 221116 People's Republic of China
| | - Yun Liu
- School of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials; Jiangsu Normal University; Xuzhou Jiangsu 221116 People's Republic of China
| | - Xiang-Shan Wang
- School of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials; Jiangsu Normal University; Xuzhou Jiangsu 221116 People's Republic of China
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Convenient synthesis of naphtho[1,6] naphthyridine derivatives under catalyst-free conditions. RESEARCH ON CHEMICAL INTERMEDIATES 2015. [DOI: 10.1007/s11164-013-1305-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Pinheiro MMG, Radulović NS, Miltojević AB, Boylan F, Dias Fernandes P. Antinociceptive esters of N-methylanthranilic acid: Mechanism of action in heat-mediated pain. Eur J Pharmacol 2014; 727:106-14. [PMID: 24486396 DOI: 10.1016/j.ejphar.2013.12.042] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2013] [Revised: 11/28/2013] [Accepted: 12/21/2013] [Indexed: 01/23/2023]
Abstract
Recently, we identified a new natural antinociceptive alkaloid ternanthranin, isopropyl N-methylanthranilate (ISOAN), from the plant species Choisya ternata Kunth (Rutaceae). In this work we concentrated on the elucidation of its mechanism of action in comparison with two other esters of this acid (methyl (MAN) and propyl (PAN)). Mice orally pre-treated with ISOAN, MAN or PAN (at 0.3, 1 and 3mg/kg) were less sensitive to chemical or thermal stimuli in different nociception models (formalin-, capsaicin- and glutamate-induced licking response, tail flick and hot plate). All compounds (1 and 3mg/kg) showed significant activity in the peripheral nociception models, as well as a dose-dependent spinal antinociceptive effect in the tail flick model. We observed that glibenclamide was able to reverse the antinociceptive effect of ISOAN in the hot plate model suggesting the involvement of K(+)ATP channels. The antinociceptive effect of MAN and PAN may be related to adrenergic, nitrergic and serotoninergic pathways. In addition, the antinociception of PAN was reverted by naloxone implying that the opioid pathway participates in its activity. The cholinergic and cannabinoid systems were found not be involved in the onset of the antinociceptive effects of any of the esters. In conclusion, isopropyl, methyl and propyl N-methylanthranilates produced significant peripheral and central antinociception at doses lower than that of morphine, the classical opioid analgesic drug, without causing toxicity.
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Affiliation(s)
- Mariana Martins Gomes Pinheiro
- Universidade Federal do Rio de Janeiro, Instituto de Ciências Biomédicas, Laboratório de Farmacologia da Dor e da Inflamação, Rio de Janeiro, Brazil
| | - Niko S Radulović
- Department of Chemistry, Faculty of Science and Mathematics, University of Niš, Višegradska 33, 18000 Niš, Serbia
| | - Ana B Miltojević
- Department of Chemistry, Faculty of Science and Mathematics, University of Niš, Višegradska 33, 18000 Niš, Serbia
| | - Fabio Boylan
- School of Pharmacy and Pharmaceutical Sciences, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin 2, Ireland
| | - Patrícia Dias Fernandes
- Universidade Federal do Rio de Janeiro, Instituto de Ciências Biomédicas, Laboratório de Farmacologia da Dor e da Inflamação, Rio de Janeiro, Brazil
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The perioperative use of nitrous oxide: renaissance of an old gas or funeral of an ancient relict? Curr Opin Anaesthesiol 2013; 26:354-60. [PMID: 23426038 DOI: 10.1097/aco.0b013e32835f8151] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE OF REVIEW Conflicting reports about adverse events following nitrous oxide (N(2)O) application have spurred a discussion whether N(2)O should be abandoned from clinical practice. Concurrently, N(2)O is increasingly used as a single anesthetic agent in medical procedures. This article reviews and discusses reports about the present use of N(2)O. RECENT FINDINGS Multiple publications demonstrate an increasing use of N(2)O as a procedural analgesic and sedative. Results from the Evaluation of Nitrous Oxide in the Gas Mixture for Anesthesia trial have been contrasted by recent studies reporting no increased risk for perioperative complications, particularly related to the cardiovascular and cerebrovascular system. Recent studies show that electroencephalogram-based anesthesia depth monitoring is not compatible with the use of N(2)O because of its distinct influence on electroencephalogram wave patterns. The clinical relevance of the proposed neurotoxicity, immunosuppression and influence on methionine metabolism remains unclear. Recently, its acute and long-term analgesic potency has been proven. Occupational exposure might pose a relevant health hazard. SUMMARY Based on the present literature, abolishment of N(2)O is controversial. When avoided in patients at risk for adverse events, N(2)O is still a valuable supplement to general anesthesia and a potent procedural analgesic drug. In the latter, its use by nonanesthesiologists should be discouraged.
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Li C, Mu XY, Li YL, Liu Y, Wang XS. Combinatorial synthesis of fused tetracyclic heterocycles containing [1,6]naphthyridine derivatives under catalyst free conditions. ACS COMBINATORIAL SCIENCE 2013; 15:267-72. [PMID: 23581605 DOI: 10.1021/co400020w] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
A three-component reaction between an aromatic aldehyde, an amine, and tert-butyl 2,4-dioxopiperidine-1-carboxylate in EtOH at refluxing temperature gave fused tetracyclic heterocycles in high yields. The amines include 1H-indazol-5-amine, 1H-indazol-6-amine, 1H-indol-5-amine, and 1H-benzo[d]imidazol-5-amine, giving 11-aryl-3H-indazolo[5,4-b][1,6] naphthyridine, 11-aryl-1H-indazolo[6,7-b][1,6]naphthyridine, 11-aryl-3H-indolo[5,4-b][1,6]naph-thyridine, and 11-aryl-3H-imidazo[4',5':3,4]benzo[1,2-b][1,6]naphthyridine derivatives, respectively.
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Affiliation(s)
- Chao Li
- School of Chemistry and Chemical
Engineering, Jiangsu
Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou Jiangsu 221116, P.
R. China
| | - Xing-Ye Mu
- School of Chemistry and Chemical
Engineering, Jiangsu
Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou Jiangsu 221116, P.
R. China
| | - Yu-Ling Li
- School of Chemistry and Chemical
Engineering, Jiangsu
Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou Jiangsu 221116, P.
R. China
| | - Yun Liu
- School of Chemistry and Chemical
Engineering, Jiangsu
Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou Jiangsu 221116, P.
R. China
| | - Xiang-Shan Wang
- School of Chemistry and Chemical
Engineering, Jiangsu
Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou Jiangsu 221116, P.
R. China
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Srinivasan V, Lauterbach EC, Ho KY, Acuña-Castroviejo D, Zakaria R, Brzezinski A. Melatonin in antinociception: its therapeutic applications. Curr Neuropharmacol 2012; 10:167-78. [PMID: 23204986 PMCID: PMC3386506 DOI: 10.2174/157015912800604489] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2012] [Revised: 02/27/2012] [Accepted: 02/27/2012] [Indexed: 12/15/2022] Open
Abstract
The intensity of pain sensation exhibits marked day and night variations. Since the intensity of pain perception is low during dark hours of the night when melatonin levels are high, this hormone has been implicated as one of the prime antinociceptive substances. A number of studies have examined the antinociceptive role of melatonin in acute, inflammatory and neuropathic pain animal models. It has been demonstrated that melatonin exerts antinociceptive actions by acting at both spinal cord and supraspinal levels. The mechanism of antinociceptive actions of melatonin involves opioid, benzodiazepine, α(1)- and α(2)-adrenergic, serotonergic and cholinergic receptors. Most importantly however, the involvement of MT(1)/MT(2) melatonergic receptors in the spinal cord has been well documented as an antinociceptive mechanism in a number of animal models of pain perception. Exogenous melatonin has been used effectively in the management of pain in medical conditions such as fibromyalgia, irritable bowel syndrome and migraine and cluster headache. Melatonin has been tried during surgical operating conditions and has been shown to enhance both preoperative and post-operative analgesia. The present review discusses the available evidence indicating that melatonin, acting through MT(1)/MT(2) melatonin receptors, plays an important role in the pathophysiological mechanism of pain.
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Affiliation(s)
- Venkatramanujam Srinivasan
- Sri Sathya Sai Medical Educational and Research Foundation, Medical Sciences Research Study Center, Prasanthi Nilayam, 40 Kovai Thirunagar, Coimbatore-641014, Tamilnadu, India
| | - Edward C Lauterbach
- Department of Psychiatry and Internal Medicine (Neurology Section), Mercer University School of Medicine, Macon GA31201, USA
| | - Khek Yu Ho
- Department of Medicine, National University Hospital, National University of Singapore Lowerkent Bridge Road, Singapore
| | - Dario Acuña-Castroviejo
- Instituto def Biotecnología, Centro de Investigaicón Biomédica, Parque Tecnológico de Ciencias de la Salud, Universidad de Granada, Avda del Conocimiento, 18100-Armilla, Granada, Spain
| | - Rahimah Zakaria
- Department of Physiology, School of Medical Sciences, Universiti Sains Malaysia, 16150, Kubang Kerian, Kelantan, Malaysia
| | - Amnon Brzezinski
- Department of Obstetrics and Gynecology, Hadassah Medical Center, The Hebrew University, Jerusalem, Israel
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Cury Y, Picolo G, Gutierrez VP, Ferreira SH. Pain and analgesia: The dual effect of nitric oxide in the nociceptive system. Nitric Oxide 2011; 25:243-54. [DOI: 10.1016/j.niox.2011.06.004] [Citation(s) in RCA: 180] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2010] [Revised: 02/17/2011] [Accepted: 06/16/2011] [Indexed: 01/22/2023]
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